François Yves Le Gal wrote:
On Tue, 12 Jul 2005 14:57:49 -0700, wrote:
Are they the same as some other tube?
The 421A is equivalent to the 5998 and a close relative of the
6AS7G/6080/6520 (the WE has more gain).
Thanks for the info Francois. I was able to test it on my Hickok 600A
with the 5998 settings.
Dave